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Jiang K, Wang X, Mao X, Lao H, Zhang J, Wang G, Cao Y, Tong I, Zhang F. Ambroxol Alleviates Hepatic Ischemia Reperfusion Injury by Antioxidant and Antiapoptotic Pathways. Transplant Proc 2013; 45:2439-45. [DOI: 10.1016/j.transproceed.2013.04.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 04/02/2013] [Accepted: 04/23/2013] [Indexed: 02/07/2023]
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Yu Q, Zhang Y, Xia Y, Yang X, Li N, Ye L, Mao X. Analysis of endothelial nitric oxide synthase (eNOS) G894T polymorphism and semen parameters in a Chinese Han population. Andrologia 2013; 46:541-6. [PMID: 23710540 DOI: 10.1111/and.12113] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/26/2013] [Indexed: 11/30/2022] Open
Abstract
Previous studies have shown that endothelial nitric oxide synthase (eNOS) gene may be involved in abnormal semen parameters. However, the relationship between eNOS G894T polymorphism and semen parameters remains controversial. The purpose of this study was to investigate the association of eNOS G894T polymorphism and semen parameters. The genotype frequency of eNOS G894T was determined in 270 idiopathic asthenozoospermia patients and 248 ethnically matched healthy volunteers using iPLEX genotyping assays on a MassARRAY(®) (Sequenom, San Diego, CA, USA) platform. The statistical analysis performed with Fisher's exact test showed no significant difference in frequencies of genotypes between both groups. The logistic regression showed that genotypes GT, TT and allele T were nonassociated with increased risk of asthenozoospermia in the patient group with ≤5% or >5% sperm with normal forms. The dependence on genotypes of semen parameters was further investigated in both patients and control group. There was no significant difference as compared to control group (P > 0.05). Our study indicated that eNOS gene G894T polymorphism may not have an adverse effect on semen parameters in a Chinese Han population.
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Yu Q, Zhou Q, Wei Q, Li J, Feng C, Mao X. SEMG1 may be the candidate gene for idiopathic asthenozoospermia. Andrologia 2013; 46:158-66. [PMID: 23289976 DOI: 10.1111/and.12064] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2012] [Indexed: 12/12/2022] Open
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Gu T, Wang X, Wang X, Wang W, Liu Y, Zhang B, Shi Y, Zhang Z, Sun Q, Xue T, Zhang X, Liu Z, Zhu S, Mao X. [The value of detecting telomerase activity on early diagnosis of lung cancer]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2013; 4:37-40. [PMID: 21040635 DOI: 10.3779/j.issn.1009-3419.2001.01.10] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To explore the possibility of telomerase as tumor marker of lung cancer and to evaluate its value on early diagnosis of lung cancer. METHODS Telomerase activity was measured in 40 resected specimens of lung cancer and 40 preoperative fibro-optic bronchoscope biopsied specimens of suspected lung cancer by PCR based silver staining telomeric repeat amplification protocal (TRAP) respectively. RESULTS The positive rate of telomerase was 100% in SCLC, but 84.8% in resected samples and 95.7% in biopsied samples in NSCLC. The positive rate of telomerase was 87.5%(35/40) in resected lung cancer tissues, 7.5%(3/40) in paracancerous tissues and 0%(0/40) in normal lung tissues (P<0.01). 82.5% (34/40) biopsied specimens of suspected lung cancer were detected with telomerase activity. Its sensitivity, specificity, and accurate rate was 96.4%, 71.4%, and 91.4% respectively for detection of lung cancer, Youden's Index (J)=0.678,and SE(J)=0.174. CONCLUSIONS Telomerase may be a sensitive tumor marker of lung cancer. Detecting telomerase activity in preoperative fibro-optic bronchoscope biopsied specimens may contribute to early diagnosis of lung cancer.
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Liu XR, Wu M, He N, Meng H, Wen L, Wang JL, Zhang MP, Li WB, Mao X, Qin JM, Li BM, Tang B, Deng YH, Shi YW, Su T, Yi YH, Tang BS, Liao WP. Novel PRRT2 mutations in paroxysmal dyskinesia patients with variant inheritance and phenotypes. GENES BRAIN AND BEHAVIOR 2012. [PMID: 23190448 DOI: 10.1111/gbb.12008] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Paroxysmal dyskinesias (PDs) are a group of episodic movement disorders with marked variability in clinical manifestation and potential association with epilepsy. PRRT2 has been identified as a causative gene for PDs, but the phenotypes and inheritance patterns of PRRT2 mutations need further clarification. In this study, 10 familial and 21 sporadic cases with PDs and PDs-related phenotypes were collected. Genomic DNA was screened for PRRT2 mutations by direct sequencing. Seven PRRT2 mutations were identified in nine (90.0%) familial cases and in six (28.6%) sporadic cases. Five mutations are novel: two missense mutations (c.647C>G/p.Pro216Arg and c.872C>T/p.Ala291Val) and three truncating mutations (c.117delA/p.Val41TyrfsX49, c.510dupT/p.Leu171SerfsX3 and c.579dupA/p.Glu194ArgfsX6). Autosomal dominant inheritance with incomplete penetrance was observed in most of the familial cases. In the sporadic cases, inheritance was heterogeneous including recessive inheritance with compound heterozygous mutations, inherited mutations with incomplete parental penetrance and de novo mutation. Variant phenotypes associated with PRRT2 mutations, found in 36.0% of the affected cases, included febrile convulsions, epilepsy, infantile non-convulsive seizures (INCS) and nocturnal convulsions (NC). All patients with INCS or NC, not reported previously, displayed abnormalities on electroencephalogram (EEG). No EEG abnormalities were recorded in patients with classical infantile convulsions and paroxysmal choreoathetosis (ICCA)/paroxysmal kinesigenic dyskinesia (PKD). Our study further confirms that PRRT2 mutations are the most common cause of familial PDs, displaying both dominant and recessive inheritance. Epilepsy may occasionally occur in ICCA/PKD patients with PRRT2 mutations. Variant phenotypes INCS or NC differ from classical ICCA/PKD clinically and electroencephalographically. They have some similarities with, but not identical to epilepsy, possibly represent an overlap between ICCA/PKD and epilepsy.
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Mao L, Jia J, Zhou X, Xiao Y, Wang Y, Mao X, Zhen X, Guan Y, Alkayed NJ, Cheng J. Delayed administration of a PTEN inhibitor BPV improves functional recovery after experimental stroke. Neuroscience 2012; 231:272-81. [PMID: 23219909 DOI: 10.1016/j.neuroscience.2012.11.050] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 11/16/2012] [Accepted: 11/28/2012] [Indexed: 01/12/2023]
Abstract
Phosphatase and tensin homolog deleted on chromosome 10 (PTEN) inhibitors administered prior to or immediately after experimental stroke confer acute neuroprotection. However, it remains unclear if delayed treatment with a PTEN inhibitor improves long-term functional recovery after stroke. We addressed the issue in this study. Adult male mice were subjected to 1h of middle cerebral artery occlusion (MCAO) followed by treatment with a well-established PTEN inhibitor BPV or saline daily for 14 days, starting at 24h after MCAO. Functional recovery was assessed with behavioral tests and acute infarct volumes were analyzed histologically. Delayed BPV treatment did not reduce infarction during the acute phase, but significantly improved long-term functional recovery after MCAO. Since PTEN is a critical intrinsic inhibitory factor in axonal regeneration, we further examined BPV effects on axonal densities following MCAO using bielschowsky silver staining and immunohistochemistry with antibodies against myelin basic protein. Delayed BPV treatment significantly increased axon densities in the ischemic brain at 14 days after MCAO. Moreover, PTEN expression persistently remained high in the ischemic brain over 14 days after MCAO, and BPV treatment increased post-ischemic activation of Akt and mTOR in the ischemic brain. Akt and mTOR activation are the well-established cascades downstream to PTEN inhibition and have been shown to contribute to post-injury axonal regrowth in response to PTEN inhibition. Consistently, in an in vitro neuronal ischemia model, BPV enhanced axonal outgrowth of primary cortical neurons after oxygen-glucose deprivation and the enhancing effects were abolished by Akt/mTOR inhibition. In conclusion, delayed BPV treatment improved functional recovery from experimental stroke possibly via enhancing axonal growth and Akt/mTOR activation contributed to BPV-enhanced post-stroke axon growth.
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Achkar AJ, Sutarto R, Mao X, He F, Frano A, Blanco-Canosa S, Le Tacon M, Ghiringhelli G, Braicovich L, Minola M, Sala MM, Mazzoli C, Liang R, Bonn DA, Hardy WN, Keimer B, Sawatzky GA, Hawthorn DG. Distinct charge orders in the planes and chains of ortho-III-ordered YBa2Cu3O(6+δ) superconductors identified by resonant elastic x-ray scattering. PHYSICAL REVIEW LETTERS 2012; 109:167001. [PMID: 23215115 DOI: 10.1103/physrevlett.109.167001] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Indexed: 06/01/2023]
Abstract
Recently, charge density wave (CDW) order in the CuO(2) planes of underdoped YBa(2)Cu(3)O(6+δ) was detected using resonant soft x-ray scattering. An important question remains: is the chain layer responsible for this charge ordering? Here, we explore the energy and polarization dependence of the resonant scattering intensity in a detwinned sample of YBa(2)Cu(3)O(6.75) with ortho-III oxygen ordering in the chain layer. We show that the ortho-III CDW order in the chains is distinct from the CDW order in the planes. The ortho-III structure gives rise to a commensurate superlattice reflection at Q=[0.33 0 L] whose energy and polarization dependence agrees with expectations for oxygen ordering and a spatial modulation of the Cu valence in the chains. Incommensurate peaks at [0.30 0 L] and [0 0.30 L] from the CDW order in the planes are shown to be distinct in Q as well as their temperature, energy, and polarization dependence, and are thus unrelated to the structure of the chain layer. Moreover, the energy dependence of the CDW order in the planes is shown to result from a spatial modulation of energies of the Cu 2p to 3d(x(2)-y(2)) transition, similar to stripe-ordered 214 cuprates.
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Dyke JP, Sondhi D, Voss HU, Shungu DC, Mao X, Yohay K, Worgall S, Hackett NR, Hollmann C, Yeotsas ME, Jeong AL, Van de Graaf B, Cao I, Kaminsky SM, Heier LA, Rudser KD, Souweidane MM, Kaplitt MG, Kosofsky B, Crystal RG, Ballon D. Assessment of disease severity in late infantile neuronal ceroid lipofuscinosis using multiparametric MR imaging. AJNR Am J Neuroradiol 2012; 34:884-9. [PMID: 23042927 DOI: 10.3174/ajnr.a3297] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE LINCL is a uniformly fatal lysosomal storage disease resulting from mutations in the CLN2 gene that encodes for tripeptidyl peptidase 1, a lysosomal enzyme necessary for the degradation of products of cellular metabolism. With the goal of developing quantitative noninvasive imaging biomarkers sensitive to disease progression, we evaluated a 5-component MR imaging metric and tested its correlation with a clinically derived disease-severity score. MATERIALS AND METHODS MR imaging parameters were measured across the brain, including quantitative measures of the ADC, FA, nuclear spin-spin relaxation times (T2), volume percentage of CSF (%CSF), and NAA/Cr ratios. Thirty MR imaging datasets were prospectively acquired from 23 subjects with LINCL (2.5-8.4 years of age; 8 male/15 female). Whole-brain histograms were created, and the mode and mean values of the histograms were used to characterize disease severity. RESULTS Correlation of single MR imaging parameters against the clinical disease-severity scale yielded linear regressions with R2 ranging from 0.25 to 0.70. Combinations of the 5 biomarkers were evaluated by using PCA. The best combination included ADC, %CSF, and NAA/Cr (R2=0.76, P<.001). CONCLUSIONS The multiparametric disease-severity score obtained from the combination of ADC, %CSF, and NAA/Cr whole-brain MR imaging techniques provided a robust measure of disease severity, which may be useful in clinical therapeutic trials of LINCL in which an objective assessment of therapeutic response is desired.
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Guo F, Mao X, Wang J, Luo F, Wang Z. Gemcitabine adsorbed onto carbon particles increases drug concentrations at the injection site and in the regional lymph nodes in an animal experiment and a clinical study. J Int Med Res 2012; 39:2217-27. [PMID: 22289537 DOI: 10.1177/147323001103900618] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
This study investigated whether gemcitabine, adsorbed onto activated carbon particles (GEM-AC), increased the concentration of gemcitabine at the injection site and in the regional lymph nodes in an experimental animal model and a clinical study. The adsorption isotherm for GEM-AC was defined, and the concentration and distribution of gemcitabine in rats (n = 50) and in patients with pancreatic cancer (n = 8) was investigated. Drug concentrations in plasma, tumour samples, lymph nodes and at the injection site were measured after GEM-AC or gemcitabine solution (GEM-Sol) were subcutaneously injected into the left hind foot pad in rats, or into pancreatic tumours in patients. These experiments showed that GEM-AC was selectively delivered to the regional lymph nodes and the injection site, from which it slowly released greater amounts of gemcitabine to maintain the free concentration of gemcitabine at a relatively high level for a long period of time. The administration of GEM-AC might enhance the anticancer effects of gemcitabine.
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Jeon JY, Kovanlikaya I, Boockvar JA, Mao X, Shin B, K Burkhardt J, Kesavabhotla K, Christos P, Riina H, Shungu DC, Tsiouris AJ. Metabolic response of glioblastoma to superselective intra-arterial cerebral infusion of bevacizumab: a proton MR spectroscopic imaging study. AJNR Am J Neuroradiol 2012; 33:2095-102. [PMID: 22576886 DOI: 10.3174/ajnr.a3091] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE SIACI of bevacizumab has emerged as a promising novel therapy in the treatment of recurrent GB. This study assessed the potential of (1)H-MRS as an adjunctive technique in detecting metabolic changes reflective of antiproliferative effects of targeted infusion of bevacizumab in the treatment of GB. MATERIALS AND METHODS Eighteen patients enrolled in a phase I/II study of SIACI of bevacizumab for treatment of recurrent GB were included. Concurrent MR imaging and (1)H-MRS scans were performed before and after treatment. Five distinct morphologic ROIs were evaluated for structural and metabolic changes on MR imaging and (1)H-MRS, which included enhancing, nonenhancing T2 hyperintense signal abnormality, and multiple control regions. Pre- and post-SIACI of bevacizumab peak areas for NAA, tCho, tCr, as well as tCho/tCr and tCho/NAA ratios, were derived for all 5 ROIs and compared using the Wilcoxon signed-rank test. RESULTS A significant median decrease of 25.99% (range -55.76 to 123.94; P = .006) in tCho/NAA was found post-SIACI of bevacizumab relative to pretreatment values in regions of enhancing disease. A trend-level significant median decrease of 6.45% (range -23.71 to 37.67; P = .06) was noted in tCho/NAA posttreatment in regions of nonenhancing T2-hyperintense signal abnormality. CONCLUSIONS The results of this (1)H-MRS analysis suggest that GB treatment with SIACI of bevacizumab may be associated with a direct antiproliferative effect, as demonstrated by significant reductions of tCho/NAA after the intervention.
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Yeste-Velasco M, Mao X, Grose R, Kudahetti S, Lin D, Chaplin T, Xue L, Xu M, Foster J, James S, Chioni A, Jeetle S, Vasiljević N, Marzec J, Gould D, Jones L, Lorincz A, Oliver RTD, Mather S, Shipley J, Berney D, Young B, Lu YJ. Abstract 4858: Identification of ZDHHC14 as a novel tumor suppressor gene commonly downregulated in human cancers. Cancer Res 2012. [DOI: 10.1158/1538-7445.am2012-4858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Tumor suppressor genes (TSGs) play critical roles in preventing tumorigenesis and they are frequently inactivated in tumours. Recently developed high-density microarrays can detect subchromosomal deletions, recurrence of which usually indicates the location of TSGs within the deleted region. We analyzed testicular germ cell tumour (TGCT) clinical samples using SNP arrays and found a frequent small deletion on the region 6q25.3 containing only one known gene, ZDHHC14. While its cellular function is unknown, ZDHHC14 belongs to the recently discovered DHHC family, which are predicted to be involved in protein palmitoylation, a reversible lipid modification that regulates membrane tethering for key proteins in cell signaling, cancer, neuronal transmission, and membrane trafficking. Consistently, we found a dramatic under-expression of ZDHHC14 mRNA and protein in TGCTs, and this associated with chemoresistance. Oncomine database mining showed that ZDHHC14 is also under-expressed in lymphoma, liposarcoma, brain, kidney, lung and colorectal cancers. Thus, it appears that ZDHHC14 downregulation may be involved in other cancers. We studied ZDHHC14 expression in prostate cancer (PCa), detecting a decrease at mRNA and protein level. We also detected that ZDHHC14 mRNA was downregulated in a pilot study on breast cancer samples. As genomic loss of the ZDHHC14 region was only detected in a small number of PCa samples, we checked whether promoter hypermethylation was the cause for ZDHHC14 downregulation. However, no changes in methylation status were found. We then sequenced the whole genomic region surrounding ZDHHC14 by next generation sequencing in TGCTs and PCa and found several mutations in the promoter, the coding region, as well as in intronic regions. Finally, we tested the function of ZDHHC14 in cell-based studies. We generated a 293 T-REx tetracycline inducible ZDHHC14 overexpressing stable cell line, which showed that ZDHHC14 overexpression decreased cell viability. The induction of apoptosis by ZDHHC14 overexpression was detected both by FACS and caspase 7 and PARP cleavage analyses. This was confirmed by transient ZDHHC14 overexpression in the PCa cell line 22RV1. In vivo we xenografted mice using both tetracycline inducible ZDHHC14 overexpressing 293 T-REx cells and control cells transfected with the empty vector. ZDHHC14 expression was induced by tetracycline at the beginning of inoculation and we detected that ZDHHC14 overexpression blocked tumour initiation completely. In conclusion, these results implicate ZDHHC14 as a tumour suppressor gene commonly inactivated in human cancers, indicating that it might exert its tumor suppressor role through the induction of programmed cell death. This is the first study showing the involvement of ZDHHC14 in a specific pathway, the classic caspase-dependent apoptosis.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 4858. doi:1538-7445.AM2012-4858
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Xu Y, Bao Q, He B, Pan Y, Zhang R, Mao X, Tang Z, Qu L, Zhu C, Tian F, Wang S. Association of angiotensin I converting enzyme, angiotensin II type 1 receptor and angiotensin I converting enzyme 2 gene polymorphisms with the dyslipidemia in type 2 diabetic patients of Chinese Han origin. J Endocrinol Invest 2012; 35:378-83. [PMID: 21670585 DOI: 10.3275/7797] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE To investigate whether the genetic polymorphisms in the angiotensin I converting enzyme (ACE) (insertion/ deletion, or I/D), angiotensin II type 1 receptor (AT1R) (rs5186), and ACE2 (rs2285666) could be associated with dyslipidemia in Type 2 diabetic (T2D) patients of Chinese Han origin. DESIGN AND METHODS The above 3 polymorphisms were genotyped in a total of 282 patients with T2D and dyslipidemia (Group A), 182 patients with T2D but without dyslipidemia (Group B), and 324 healthy controls. The association between a certain polymorphism and each group was assessed by an odds ratio (OR). RESULTS The D allele of the ACE (I/D) was significantly associated with the risk of T2D accompanying dyslipidemia between group A and controls [OR=1.37, 95% confidence interval (CI)=1.08-1.74; p=0.010], and significant association of the D allele with dyslipidemia was also observed in diabetic patients (OR=1.88, 95% CI=1.40-2.54; p<0.001). Furthermore, the ID genotype had a decreased risk of developing T2D without dyslipidemia as compared with controls (OR=0.52, 95% CI=0.32-0.82; p=0.0060). The distributions of the AT1R (rs5186) and ACE2 (rs2285666) genotypes and alleles did not differ between T2D patients with or without dyslipidemia and the controls. CONCLUSIONS This study demonstrates that the ACE (I/D) polymorphism is associated with T2D, regardless of the absence or presence of dyslipidemia. The polymorphisms in the AT1R (rs5186) and ACE2 (rs2285666) seem to play lesser roles in the development of T2D.
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Prasadam I, Mao X, Wang Y, Shi W, Crawford R, Xiao Y. Inhibition of p38 pathway leads to OA-like changes in a rat animal model. Rheumatology (Oxford) 2012; 51:813-23. [DOI: 10.1093/rheumatology/ker360] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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Zhang X, Mao X, Zhang W, Zhang J, Cao W. Giant head neurofibroma. Neurology 2012; 78:71. [PMID: 22201112 DOI: 10.1212/wnl.0b013e31823ed117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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115
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Shungu D, Weidschat N, Mao X, Pillemer S, Murrough J, Mathew S. P-801 - In vivo neuroimaging evidence of oxidative stress in major depressive disorder. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)74968-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Watt SA, Pourreyron C, Purdie K, Hogan C, Cole CL, Foster N, Pratt N, Bourdon JC, Appleyard V, Murray K, Thompson AM, Mao X, Mein C, Bruckner-Tuderman L, Evans A, McGrath JA, Proby CM, Foerster J, Leigh IM, South AP. Integrative mRNA profiling comparing cultured primary cells with clinical samples reveals PLK1 and C20orf20 as therapeutic targets in cutaneous squamous cell carcinoma. Oncogene 2011; 30:4666-77. [PMID: 21602893 PMCID: PMC3219832 DOI: 10.1038/onc.2011.180] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Revised: 03/30/2011] [Accepted: 04/01/2011] [Indexed: 01/03/2023]
Abstract
Identifying therapeutic targets for cancer treatment relies on consistent changes within particular types or sub-types of malignancy. The ability to define either consistent changes or sub-types of malignancy is often masked by tumor heterogeneity. To elucidate therapeutic targets in cutaneous squamous cell carcinoma (cSCC), the most frequent skin neoplasm with malignant potential, we have developed an integrated approach to gene expression profiling beginning with primary keratinocytes in culture. Candidate drivers of cSCC development were derived by first defining a set of in vitro cancer genes and then comparing their expression in a range of clinical data sets containing normal skin, cSCC and the benign hyper-proliferative condition psoriasis. A small interfering RNA (siRNA) screen of the resulting 21 upregulated genes has yielded targets capable of reducing xenograft tumor volume in vivo. Small-molecule inhibitors for one target, Polo-like kinase-1 (PLK1), are already in clinical trials for other malignancies, and our data show efficacy in cSCC. Another target, C20orf20, is identified as being overexpressed in cSCC, and siRNA-mediated knockdown induces apoptosis in vitro and reduces tumor growth in vivo. Thus, our approach has shown established and uncharacterized drivers of tumorigenesis with potent efficacy as therapeutic targets for the treatment of cSCC.
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Kaufmann P, Engelstad K, Wei Y, Kulikova R, Oskoui M, Sproule DM, Battista V, Koenigsberger DY, Pascual JM, Shanske S, Sano M, Mao X, Hirano M, Shungu DC, Dimauro S, De Vivo DC. Natural history of MELAS associated with mitochondrial DNA m.3243A>G genotype. Neurology 2011; 77:1965-71. [PMID: 22094475 PMCID: PMC3235358 DOI: 10.1212/wnl.0b013e31823a0c7f] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To describe the natural history of clinical and laboratory features associated with the m.3243A>G mitochondrial DNA point mutation. Natural history data are needed to obtain prognostic information and for clinical trial planning. METHODS We included 85 matrilineal relatives from 35 families with at least 2 visits in this prospective cohort study. Thirty-one were fully symptomatic with mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes (MELAS), and 54 were carrier relatives. Evaluations included standardized questionnaires (medical history and daily living functioning), physical examination, neuropsychological testing, and a battery of imaging and laboratory tests. We evaluated changes in clinical and laboratory features over time and survival. Outcomes are reported over a follow-up period of up to 10.6 years (mean 3.8 ± 2.2 years for patients and 5.5 ± 3.0 for carrier relatives). RESULTS Neurologic examination, neuropsychological testing, and daily living scores significantly declined in all patients with MELAS, whereas no significant deterioration occurred in carrier relatives. Cerebral MRI scores declined significantly in patients with MELAS. Magnetic resonance spectroscopy estimates of lactate in the lateral ventricles increased over time, and high lactate was associated with increased mortality. Symptom onset in childhood often was associated with worse outcome. Patients with MELAS had a greater death rate than carrier relatives. CONCLUSIONS Patients with MELAS carrying the m.3243A>G mutation show a measurable decline in clinical and imaging outcomes. It is hoped that these data will be helpful in anticipating the disease course and in planning clinical trials for MELAS.
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Gan F, Cao B, Wu D, Chen Z, Hou T, Mao X. Exploring Old Drugs for the Treatment of Hematological Malignancies. Curr Med Chem 2011; 18:1509-14. [DOI: 10.2174/092986711795328427] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Accepted: 03/06/2011] [Indexed: 11/22/2022]
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Jain SM, Mao X, Escalante-Pulido M, Vorokhobina N, Lopez I, Ilag LL. Prandial-basal insulin regimens plus oral antihyperglycaemic agents to improve mealtime glycaemia: initiate and progressively advance insulin therapy in type 2 diabetes. Diabetes Obes Metab 2010; 12:967-75. [PMID: 20880343 PMCID: PMC2997325 DOI: 10.1111/j.1463-1326.2010.01287.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To compare two progressive approaches [once-daily insulin glargine plus ≤3 mealtime lispro (G+L) vs. insulin lispro mix 50/50 (LM50/50) progression once up to thrice daily (premix progression, PP)] of beginning and advancing insulin in patients with type 2 diabetes (T2D) and inadequate glycaemic control on oral therapy, with the aim of showing non-inferiority of PP to G+L. METHODS Patients were randomized to PP (n = 242) or G+L (n = 242) in a 36-week, multinational, open-label trial. Dinnertime insulin LM 50/50 could be replaced with insulin lispro mix 75/25 if needed for fasting glycaemic control. RESULTS Baseline haemoglobin A1c (HbA1c) were 9.5% (PP) and 9.3% (G+L); p = 0.095. Change in A1C (baseline to endpoint) was -1.76% (PP) and -1.93% (G+L) (p = 0.097) [between-group difference of 0.17 (95% confidence interval: -0.03, 0.37)]. Non-inferiority of PP to G+L was not shown based on the prespecified non-inferiority margin of 0.3%. A1C was lower with G+L at weeks 12 (7.8 vs. 7.9%; p = 0.042), 24 (7.4 vs. 7.6%; p = 0.046), but not at week 36 (7.5 vs. 7.6%; p = 0.405). There were no significant differences in percentages of patients achieving A1C ≤7%, overall hypoglycaemia incidence and rate or weight change. Total daily insulin dosages at endpoint were higher with PP vs. G+L (0.57 vs. 0.51 U/kg; p = 0.017), likely due to more injections (1.98 vs. 1.79; p = 0.011). CONCLUSIONS Both treatments progressively improved glycaemic control in patients with T2D on oral therapy, although non-inferiority of PP to G+L was not shown. Higher insulin doses were observed with PP with no between-treatment differences in overall hypoglycaemia or weight gain.
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Mathew SJ, Price RB, Shungu DC, Mao X, Smith ELP, Amiel JM, Coplan JD. A pilot study of the effects of chronic paroxetine administration on hippocampal N-acetylaspartate in generalized anxiety disorder. J Psychopharmacol 2010; 24:1175-81. [PMID: 19204062 DOI: 10.1177/0269881108101796] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The neural basis of generalized anxiety disorder (GAD) is poorly characterized. The effect of chronic administration (12 weeks) of paroxetine, a selective serotonin reuptake inhibitor, on N-acetylaspartate (NAA), a marker of neuronal viability, was evaluated in adults with GAD using proton magnetic resonance spectroscopic imaging ((1)H MRSI) at 1.5 T. We hypothesized that, pretreatment abnormalities in hippocampal NAA/creatine (NAA/Cr) would normalize with symptomatic improvement. Nine GAD patients (mean age = 41.7 year; 4 females) received 12 weeks of open-label paroxetine treatment, flexibly dosed up to 60 mg/day. Clinical outcome was assessed with the Hamilton Anxiety Rating Scale (HAM-A). Multislice ( 1)H MRSI scans were performed at unmedicated baseline and following 6 and 12 weeks of treatment. Ten untreated healthy volunteers (HVs) (mean age = 37.1 year; 4 females) received scans at the same intervals. All patients achieved remission (HAM-A <or= 7) by week 12. Compared to HVs, GAD patients showed persistently lower levels of bilateral hippocampal NAA/Cr (17.7% mean decrease; Cohen's d = 1.29) that were maintained across all three time points, despite marked symptom improvement. This pilot study failed to support an association between a hippocampal neuronal marker and anxiolytic response to paroxetine, and suggests further investigation of potential trait-like hippocampal abnormalities in GAD.
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Chu Q, Mao X, Chen S, Xing F, Li H, Chen L, Qiu Z, Song Q. UP-3.128: Effect of Spermatozoa Derived from Ejaculation, Epididymis and Testis on Outcome of ICSI. Urology 2009. [DOI: 10.1016/j.urology.2009.07.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zhao B, Wang H, Mao X, Li R. A rapid screening method for bacteria degrading polycyclic aromatic hydrocarbons. Lett Appl Microbiol 2009; 49:408-10. [DOI: 10.1111/j.1472-765x.2009.02668.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Mao X, Wang S, Pan Y, He B, Chen J, Jiang H, Zeng Q, Xu X. Roles of Inhibitors of Poly(ADP-ribose) Polymerase in Protecting Rat RINm5F Cell Line against Free Fatty Acid-induced Apoptosis. Exp Clin Endocrinol Diabetes 2009; 117:274-82. [DOI: 10.1055/s-0029-1202794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Said R, Nguyen Dinh Cat A, Mao X, Charhbili V, Huet-Panek N, Labat C, Jaisser F, Lacolley P, Regnault V. K008 Le récepteur aux minéralocorticoides modifie la sensibilité au système anticoagulant de la protéine C. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72411-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Mao X, Said R, Louis H, Li Z, Regnault V, Lacolley P. J009 Effets des contraintes mécaniques sur l’intégrine alpha V beta 3 des cellules musculaires lisses vasculaires. Arch Cardiovasc Dis 2009. [DOI: 10.1016/s1875-2136(09)72384-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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